The analysis, conducted by the U.S. Centers for Disease Control and Prevention (CDC), was based on over 1.2 million data collected between March 2020 and September 2021 from the largest hospitals in the country.
In general, stillbirths were very rare and accounted for 0.65% of the total stillbirth. or 8,154 births. However, after applying statistical methods to account for other variables that may affect the result, stillbirths were found to be 1.47 times more common among COVID-19 positive mothers still ahead of Delta, 4.04 times more often after and 1.9 times more often in total.
Among the births of women with COVID-19, conditions such as chronic hypertension, having more than one child, heart disease, separation of the placenta from the uterus, sepsis, poor blood flow causing shock, life-threatening lung damage, and the need for a ventilator or ICU have been associated with a higher stillbirth rate.
– Additional research is warrantedto investigate the impact of complications from COVID-19 on the risk of stillbirth, and are considered to be the most significant in linking COVID-19 to stillbirth, the study authors said.
The current analysis covers an additional year of data, bringing more and more evidence that COVID-19 is associated with an increased risk of stillbirth, they wrote.